Multi-Sensor Gas Type Identification Using Sensing Value Ratios
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Solution Overview
Problem
Semiconductor type gas sensors cannot distinguish between different gas types present in the air, only measuring the concentration of target gases while also sensing other co-existing gases, making it impossible to determine the specific gas type.
Innovation Solution
An electronic apparatus equipped with multiple gas sensors of different types, each outputting sensing values, and a processor that determines the gas type by referencing stored information on the ratios of these values, allowing for the identification of gas types and concentrations, and controlling fan speed and communication with other devices based on the determined gas type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a semiconductor type gas sensor is used to measure gas concentration, then the sensing capability is improved, but the ability to distinguish gas types deteriorates
Solution Approach 1:
The patent divides the gas sensing task into multiple independent sensing channels by using several different types of gas sensors simultaneously. Each sensor type responds differently to various gas components, creating segmented measurement data that can be综合分析 to identify both gas type and concentration, thus resolving the contradiction between measurement precision and information loss.
2Loss of information
If multiple different types of gas sensors are used to determine gas type, then the gas type identification capability is improved, but the device complexity increases
Solution Approach 1:
The patent makes the gas sensing system multi-functional by equipping it with multiple types of gas sensors that can simultaneously perform both gas type identification and concentration measurement. This universal approach allows a single system to achieve multiple objectives, improving gas type identification capability while managing complexity through integrated design.
Solution Approach 2:
The patent introduces a processor as an intermediary that receives sensing values from multiple gas sensors and determines gas type by analyzing the ratios between these values. This intermediary component manages the complexity of multiple sensors by providing a centralized analysis mechanism, comparing sensing value ratios against stored reference information to identify gas types without requiring complex individual sensor designs.
3Measurement precision
If multiple gas sensors with different semiconductor layers are used, then the gas type detection accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by using different semiconductor layer materials in different gas sensors within the same system. Each semiconductor layer is specifically designed to be sensitive to particular gas components, creating localized sensing characteristics that improve overall gas type detection accuracy. This approach allows tailored sensing properties in each sensor while maintaining a manageable manufacturing process through standardized sensor modules.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate identification of gas types and concentrations, allowing for appropriate control of ventilation systems and communication of gas information to other devices, improving air quality monitoring and control.
Implementation Method 1
the semiconductor type gas sensor measures the amount of gas by using the degree of change of the resistance value as the material to be measured, which is adsorbed on the surface is oxidized or reduced
Implementation Method 2
the material to be measured, which is adsorbed on the surface is oxidized or reduced
Implementation Method 3
the material to be measured, which is adsorbed on the surface is oxidized or reduced
Data Source
AI summary
An electronic apparatus is provided. The electronic apparatus according to an embodiment includes a plurality of different types of gas sensors configured to output sensing values based on sensing a gas, and a processor configured to determine a gas type corresponding to a plurality of sensing values respectively output from the plurality of different types of gas sensors.